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Expired European patentEurope

Process for the acid pickling of steels, in particular stainless steels

EP 0188975 B1 · Applicant: UGINE S.A.

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Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.

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Why it's free to use

  • Filed January 22, 1985 and granted April 26, 1995. A European patent lasts at most 20 years from filing, so its term ended January 22, 2005.
  • A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by July 22, 2010.
  • We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledJanuary 22, 1985
PublishedJuly 30, 1986
GrantedApril 26, 1995
Term endedJanuary 22, 2005
Application numberEP 85420013
Classification (CPC)C23G1/086

Timeline

Timeline From EPO dates

1986198819901992199419961998200020022004Application filedJan 22, 1985PublishedJuly 30, 1986Patent grantedApril 26, 1995Term endedJan 22, 2005

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

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